Had been messing with KDE last week.Just restored my Mint Cinnamon from Jan. 27th backup needing some images I forgot to backup to external.And did an upgrade that includes Cinnamon Nightlies.And just received this which has me baffled? Seems a repository conflict?

E: /var/cache/apt/archives/cinnamon-common_1.6.7-20130201045010-quantal_all.deb: trying to overwrite '/etc/xdg/menus/cinnamon-applications.menu', which is also in package cinnamon 1.6.7-20130127045007-quantal

Nightlies always went smoothly with no errors till now and wondering how to resolve this?And concerned about the dropbox issue.Thanks

Update: Yep logged off and back on and Cinnamon is borked with error and session lasted 10 seconds kind of thing with x-session errors. Restored KDE to get back to working system. As bad timing to have it down at the moment..

Had something very similar happen two days ago with the cinnamon nightly build. Don't remember exactly what the error was but it complained about not being able to find cinnamon-common or something. When I logged out cinnamon was no longer even an option from the login screen. I just backed up my files and re-installed mint 14. Guess that's the price you pay for using the nightly build but that is the first time I have encountered any real issues with it and I have been using them since shortly after Mint 13 was released.

Same issue restored Mint 14 Cinnamon booted up and worked fine.Then a bunch of updates since jan. 27th and after updates same kind of error about cinnimon config file?Like posts above and was using nightlies.

One broken package which I fixed but logging out or reboot from cold getting Black Screen with Mouse the only thing working.No Desktop only solution hard reset switch. Doesn't matter if I reboot in recovery mode or not same Black screen and mouse pointer.

Had to restore my KDE desktop and this is ongoing issue with problem jan. 27th and today same problem. As can restore to working Cinnamon 14 as long as I don't update. And no clue what the issue is.

Guess I'll have to wait for Cinnamon 15 and do a clean install then. Or might when I have more time give it a go and get more verbose info during the upgrades.